Multiple bolt.



PATENTED JAN. 9, 1906.

J. H. PRBI'SMAN.

MULTIPLE BOLT.

APPLICATION FILED 33mm, 1905.

l/viinaoaco W 6 JOHN H. PRETSMAN, OF GREENVILLE, orno MULTIPLE BOLT.

Specification of Letters Patent.

Patented Jan. 9, 1906.

Application filed September 15, 1905. Serial No 278,627.

To all whom it may concern.-

Be it known that I, J OHN H. PRETSMAN, a citizen of the United States,residing at Greenville, in the county of Darke and State of Ohio, haveinvented new and useful Improvements in Multiple Bolts, of which thefollowing is a specification.

My invention pertains to multiple bolts; and it consists in the simple,inexpensive, and reliable multiple bolt hereinafter described, andparticularly pointed out in the claim appended.

In the accompanying drawings,forming part of this specification, Figure1 is a view, partly in elevation and partly in section, illustrating theinner side of a door equipped with my novel multiple bolt. Fig. 2 is anelevation of the outer side of the said door, and Fig. 3 is an enlargedperspective view of the operatingshaft of the multiple bolt removed.

Similar letters designate corresponding parts in all of the views of thedrawings, referring to which- A is a hinged door arranged when closed tosecure a companion door B.

O and D are lower and upper keeper-sockets disposed in lower and upperbars E and F, and G is my novel multiple bolt as a whole.

In the present and preferred embodiment of my invention the multiplebolt Gr comprises a lower vertically-movable bolt H, disposed in a guideI on the door A and arranged when the door is closed to take into thekeeper-socket C, an upper vertically-movable bolt J, disposed in a guideK on the door A and arranged when the door is closed to be moved intoand out of the keeper-socket D, a sheave L, mounted on the inner side ofthe door A in close proximity to the lower end of the bolt J, sheaves Mand N, mounted on the inner side of the door A and arranged at about theheight and the distance apart illustrated, a shaft P, extendingtransversely through the door A in a plane below the sheaves M and N, aT-lever Q, having itshead R fixed at the middle thereof on the inner endof the shaft P and also havinga stem provided with a handle S, a cableT, passed around the sheaves L and N and connecting the lower end of thebolt J and one end of the head R of the Tlever, a cable U, passed overthe sheave M and connecting the opposite end of the head of the T-leverand the upper end of the bolt H, and a lever V, mounted on the outer endof the shaft P and provided with a handle W.

In virtue of the construction and relative arrangement of the parts ofmy novel multiple bolt as described in the foregoing it will be observedthat the stem of the T-lever Q and the lever V will gravitate to andnormally rest in the pendent positions shown in Figs.

1 and 2 and by so doing will keep the cables T and U taut, as shown inFig. 1, and the bolt J up in proper engagement with the keepersocket D.The lower bolt H will by. reason of gravity remain of itself inengagement with the keeper-socket C, and hence it will be observed thatmy novel multiple bolt is adapted to effectually prevent casual releaseof the door.

WVhen it is desired to release the door equipped with my novel multiplebolt, the same may be accomplished by grasping either the handle S orthe handle IV and rocking the shaft P in the direction indicated byarrow in Fig. 1, since when this is done the bolt H will be raised,through the medium of the cable U, to a point out of engagement with thekeepersocket (J, while the cable 1 will be slackened so as to permit theboltJ to gravitate or move of itself out of engagement with thekeepersocket D. To latch the door, it is simply necessary to close thesame, while the stem of the lever Q is swung toward the right, and thenrelease the said lever. On the release of the said lever it willbe seenthat the same will automatically assume the position shown in Fig. 1 andby so doing will slacken the cable U to permit the bolt H to drop intothe keeper-socket G and will draw on the cable T so as to raise the boltJ into engagement with the keeper-socket D.

It will be apparent from the foregoingthat my novel multiple bolt ismade up of but a minimum number of parts and that no one of the saidparts is liable to get out of order after a short period of use. It willalso be gathered that the multiple bolt may be operated with but aminimum amount of effort on the part of a child or otherperson whodesires to open or close the door.

I claim- In a multiple bolt, the combination of a door, lower and uppervertically-movable bolts arranged in guides on the inner side of thedoor, a sheave mounted on the inner side of the door in close proximityto the lower end of the upper bolt, sheaves arranged in about the samehorizontal plane at a point adjacent to the horizontal median line ofthe door, an operating-shaft extending transversely through the doorbelow the two last-mentioned sheaves,

IIO

a lever fixed to and normally depending from I opposite end of the headof the T-lever and I0 the outer end of the shaft, a T-lever having ahead fixed at its middle on the inner end of the shaft and also having apendent stem, a cable passed around the first-mentioned sheave and oneof the other sheaves and connecting the lower end of the upper bolt andone end of the head of the T-lever, and a cable passed over theremaining sheave and connecting the the upper end of the lower bolt.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

JOHN H. PRETSMAN. Witnesses:

V. A. WELBOURN, A. C. BRANDON.

